Driving wheel for clocks



Jan. 8 1924.

c. G. RlL EY DRIVING WHEEL FOR CLOCKS Filed Jan. 21 1922 INVENTOR cam fiy 9wia m Fatented Jan. 8, 1924.

PATENT OFFICE.

CLIFFORD G. RILEY, OF SALE, ENGLAND.

DRIVING WHEEL FOR CLOCKS.

Application filed January 21, 1922.

T0 aZZ whom it may concern:

Be it known that I, CLIFFORD GARIEL RILEY, a British subject, residing at Sale, county of Chester, England, have invented certain new and useful Improvements in Driving Vheels for Clocks, of which the following is a specification.

The invention relates to weight actuated driving mechanism for sustaining a weight cord for clockwork mechanism by which the re-winding or raising of the weight can be readily effected after its descent.

It comprises a simple construction of cord wheel or pulley whereby a clock or other similar instrument may be driven by a weight and cord and rewound without the use of ratchet mechanism.

It has the advantage of being extren'iely simple and rigid and for this reason cannot get out of order. It has also the advantage of being easily manufactured and can therefore be produced at a small. cost.

The invention will be fully described with reference to the accompanying drawings.

Fi l is a front elevation showing a modified construction of driving wheel and cord pulley or wheel stamped from one piece.

Fig. 2 is a sectional elevation of same.

ACCOlTllllg to the invention a cord pulley A and a toothed driving wheel B are pressed or stamped from wheel metal in one piece as shown. Around "the centre the part marked (1- is pierced or stamped out leaving hall the nuu'iher oi teeth (1- and the integral strips (1. to form the corresponding number of teeth to form the cord pulley or wheel A. The teeth a are bent outward at their base to an angle of from to 40 and the centre 05" is dished out along the strips 4 to form the other side of the serrated or interruptixl cord groove. The wheel B may be formed with an annular rib or corrugation I) to stiffen it and to prevent the cord catching in the teeth around its periphery.

A cord or string C is passed over the pulley A so as to lie in the serrated or in terrupted groove formed by the bent teeth a Serial No. 530,960.

round its periphery, giving to the cord C a waviness of line as it passes over the periphery between the teeth.

A weight is attached to one end of the. cord or string C, and a weight'lV to the other end the weight W being considerably heavier than the weight TV, the tension thus produced on the cord will cause it to lie between the teeth a and the gaps of the wheel in a wavy line, this waviness preventing the cord (.1 from slipping. In order to re-wind, the heavier weight is lifted. thus destroying the tension on that part of the cord up to the wheel A. The cord which happens to lie on the wheel at the time therefore loses its wavy shape and will then slip over the wheel, past the teeth, being drawn by the smaller weight W". The driving power developed during the descent of the large weight V will be equal to the ditference in. weight between the two weights. The larger or heavier weight V is preferably. about four times as havy as the other weight VJ.

he result is that the large weight lV utter descent may be raised so as to re-wind the clock of? the simple application to it of upward pressure.

lVhat I claim as my invention and desire to protect by Letters Patent is? In a weight driven clockwork mechanism a compound driving wheel stamped from sheet metal eon'iprising a dished centre pier-ed out to form the teeth, half of the teeth being bent outwards at their base forn'iing a serrated groove adapted to receive the weight cord and the periphery formed with pinion teeth adapted to mesh with the clock train substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

(l. G. RILEY.

\Vitnesses J. Owner: OBRIEN, GEORGE H. OBRIEN. 

